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Resources for Communication Problems

Saturday, February 2, 2008

NC2427子倫

NC2427子倫

NC009F1-02

Nervous system axes and directional terms. A. The nervous system in lower primates develops along a straight line. B. The human nervous system is organized along horizontal and vertical axes because of the cephalic flexure at the junction of the cerebral hemisphere and midbrain. For the cerebral hemisphere and diencephalon, the directions of these terms change systematically. C. The directional terms used for the spinal cord and brainstem are similar to those employed for lower vertebrates. D. The directional terms on the human body surface.

NC299TT06

NC319F15-13

Double vision caused by oculomotor nerve paralysis. In left oculomotor paralysis, the eyelid droops (ptosis) and the eye moves laterally, making the eyes disconjugate. As a result, when looking straight ahead (top), the patient sees two images. The patient continues to see two images (bottom left) when looking to the right because the left paralyzed eye cannot move beyond the midline. However, a left movement of the right eye allows the eyes to conjugate (bottom right); hence the diplopia disappears.

NC367F16-10

Commonly secreted pituitary hormones in the adenohypophysis and neurohypophysis. Hormones of the anterior pituitary gland, or adenohypophysis, are growth hormone(GH), thyrotropin, adrenocorticotropic hormone (ACTH), gonadotropin, and prolactin. The posterior pituitary lobe, or neurohypophysis, contains vasopressin and oxytocin. Secreted by cells in the supraoptic and paraventricular hypothalamic nuclei, these hormones regulate kidney function (vasopressin) and glands of the breasts (oxytocin).

NC377TT35

tremors

Rhythmic pin-rolling movements of the fingers at rest, along with akinesia and rigidity that characterizes Parkinson disease. Intention tremor occurs during movement and results from cerebellar pathology.